Because Bob ran down the rocky road he fell over badly.

As the thunder noisily roared, the hobbits scaredly hid.

When Bilbo slept in a small, dripping cave, the fierce goblins (armed with weapons) attacked.

When the measly cart came to a wheezing halt, Gandalf  smartly strode into the miniscule hobbit hole.

Since Jim was ecstatically interested in the idea, he immediately rang his friend.

Because owls are nocturnal, they are active at night, and so therefore have excellent, sharp eyesight.